19804223106 has 24 divisors (see below), whose sum is σ = 42941733120. Its totient is φ = 6596394936.

The previous prime is 19804223059. The next prime is 19804223123. The reversal of 19804223106 is 60132240891.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 393330 + ... + 440813.

It is an arithmetic number, because the mean of its divisors is an integer number (1789238880).

Almost surely, 2^19804223106 is an apocalyptic number.

19804223106 is an abundant number, since it is smaller than the sum of its proper divisors (23137510014).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

19804223106 is a wasteful number, since it uses less digits than its factorization.

19804223106 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 835470 (or 835467 counting only the distinct ones).

The product of its (nonzero) digits is 20736, while the sum is 36.

Adding to 19804223106 its reverse (60132240891), we get a palindrome (79936463997).

The spelling of 19804223106 in words is "nineteen billion, eight hundred four million, two hundred twenty-three thousand, one hundred six".